Grease gun



March 11, 1930. K. N. WILLMORE GREASE GUN Filed lay 25, 1929 2 Sheets-Sheet 1 w m m m KAI/6H7 Al. MAL/MORE" vam w A T TORNEYS.

Patented Mar. 11, 1930 y'frxrrream N. y In1;, oRn ,'oF= ieArRFAx, OKLAHOMA Application filer} 'T-h'is inventionlappertains to aportah'le deee r g i g ear ng h' es e ings 'of-m'otor ehj cles and one of, the primary objects of my invention is to provide a novel device for eifectiyely'fhandling hear luhrih eent's eii n he h ree'eii i; .eetere but which issusceptlible'ior hanlingall types of lubricant ell 'el e ee 9i rheterfyeh lee Another salient object of my invention i s e p e n f n ve n er fer iere ne e luhrieenhfrnme rteh e re se r n by hih eneeri. 1 errenging'hhe. P i-rte e p t a du ab e eh h hir Willhe he hhj O myin ent n is he Prevision-hf e p eh hyd e rl e g easingde iee r m eh' e es mbeeyin Chas Plate li yi t p ort g heels, Whieh tached th fih he 11131 5 1? 39 1 yl nd en th .ninr fer ere nghhe l qu d;

under pr s hreh h the en in"'1 he yl e e p' te e ing pl ed iree ly h reto t e. eser i an h r the] ginisi used in actuating the piston.

A still n t e ieei f my nrent en i he provide a 'lu ee g dev ee 9f the ehene Character, ic l'l 'e .efiieient in use, ene e l b mp e a d e sy t nennfnetn e and one which can'he placed upon the market at a reasonable cost.

With hes and e her ehjeeie in n w, the. en i n n is n the n v en ri etien, nge n n rrnetien n per e, w ll be h e af ine e epeeifi el'ly de erih h h d lustrate in the eeeernp nyin drawings, in which drawings:

Figure 1 is a side elevation of my improved lubricating device;

Figure Q-is a horizontal section through-the same taken on the line 22 of Figure Ifloo'lring in the direction of thearroW-s;

Figure 3 is a fragmentary rear elevation of the upper end of the device showing parts thereof broken awayand in section;

Figure 4 is-a transverse section through the 5 low r portion o the im-p pved de ice i lnet ne he no el ien e geinent e th eperetng pa Figure 5 is a de e lseeti n wh n en th line 55 of Figure 3 looking in the direct on. of the arrows, and

razeser ei in whose Figu e 5 is e de ail seetien taken on the ine 6+ 9f Figure l ekine'ri the d r et en Of t e ,errews.

g-t0 the dra ings in etail, here in .e niler refere ce 'here e re design te e 5s re penfi n"perheth enghentthe several new th l tte -h enerel y i dieete iny impro e de iee Wh ee nriee b se la 0 east riern u tab e ne el- "Ihe e plate 10 ha n tesl e eth i'wi e eeenred Lethe side feces e0 her nf es lieee t he it Q 'WZ Kl end dep ndns hreehets' 7 .1 ier the greiind wheelealz whereby the device can be conveniently ingyed ren p nt t pein- L 'eQni netien w th th eee p ate 0 l ut li e .a eylinder 3 tor the reeept en 9f the lgreee 1e wh ch in he need eri uhrieeting th hearings and l re r h e s the le erylinder head .15 tie eef nt gral with the bas plate 10. This h d 15 is pro ided with n annula ups and ng nternal y threa ed flang l6 .fe :the .re e-P: tien or the t reeeled'lon nd .of the y nel r let. The r pp r ead 7 f r th ylinder ie threaded thereen .se that the en he em ved to pe m t the filli g of the ylin: derivith the desi ed g ease. Shd hly nennh d within th eylinrler 1. s h enh nd rl Pie er; the n r'eie e o which t e he egrh'lly eenne ed g th r by an axial boss ens l eei ih p ti n een ca ry n 0ppositel x endi g W sh 2 h npp le'ylinsler head 17 supports the outlet boss or nipple 2,1 for the lubricant and the upper end of the boss is provided with a ground seat for the recep on e the outle h 12 wh h n h re njoyably held in place by the use of a suitble e'1an p23, h entlet h a 22 8 P o id d with a laterally extending pipe 24: which has threaded thereon a sleeve 25 which rotatabjly eceiresa h ead d nipple 26 for connection with the feed pipe-27, the lower end of which ca he st pped as at 2 to the base plate 10.- The outer end of the pipe is provided with a flexible hose 29 and nozzleBO for feeding the lubricant to theodesired h a ng- When t i sir d t .51 t e ey i d .13 ith th lubr ant 14 th hee .22 i s ung e f of th sen fierthe .elarnp ha b en released and h vhead 'Qh Ies .on the nipple 26- A t which the cylinder head 17 can be unthreaded and the lubricant placed in the cylinder in any preferred way. If desired, I can provide an expansion spring 31 in the sleeve 25 for engaging the inner end of the nipple 26 to normally hold the same in tight contact with its seat formed on the sleeve 25 to prevent the leakage of the lubricant around the same The lower cylinder head 15 andthe base plate 10 have formed therein a return passage 32 communicating with the lower end of the cylinder on the lower side of the innermost piston and opening out through the lower face of the base plate 10 into the reservoir tank 33 which holds the fluid, such as light oil, for raising the piston 18 to force the lubricant from the cylinder. Any suitable valve means can be provided such as the needle valve'34, for manually controlling this return passageway, and the passageway is normally cut off by said needle valve.

The reservoir tank 33 preferably has formed on its upper edge a laterally extending attaching flange 35 which is bolted or attached to the 'base plate 10 by means of cap screws 36. In order to make a fluid tight connection between the base plate 10 and the flange 35, a suitable gasket 37 can be interposed between the base plate and said flange.

Cast integral with the' base plate lO'and the lower cylinder head 15 at one side of'the cylinder 13 I provide a relatively small pump cylinder 40 and in alinement with the pump cylinder and communicating therewith is a depending hollow boss 41 which extends into the reservoir tank 33. If desired, this boss can have threaded into the same a suitable inlet pipe 42 which terminates short of the lower wall of the reservoir.v The pump cylinder 40 has slidably mounted therein a solid pump plunger 43 which can be actuated in any desired way, such as by a hand lever 44 which extends up along the side of the cylinder 13. The lower end of the hand lever 44 is rockably mounted as at 45 to an upstanding bracket 46 which can be formed on the base plate. The lower end of the lever is provided with an operating arm 47 which is connected by means of a link 48 with the pump plunger 43. The bracket 46 and the hand lever 44'can be provided with companion lugs 49 so as to limit the swinging movement of the hand lever in one direction. The cylinder head and the base plate diametrically opposite the passage 32 are provided with a passage 50 which communicates with the lower end of the cylinder 13 and the lower end of the pump cylinder 40 below the plunger 43.

An inlet valve seat 51-is arranged in the bore of the boss 41 andis provided with an upwardly opening ball valve 52 for controlling the flow of oil into the pump cylinder. Likewise the passageway 50 is provided with a one-way spring pressed ball check valve 53 which constitutes the outlet valve for the oil from the pump.

The lower end of the cylinder 40 in alinement with the passageway 50 can be provided with a radially extending enlarged opening 54 which can be closed by a plug 55 which facilitates the placing of the valve 53 in position and also the cleaning of the device.

The 'valve 52 and its seat 51 can be placed in position through the upper end of the pump cylinder after the removal of the pump plunger. The upper end of the cylinder 40 can receive a packing gland 56 for preventing the leakage of oil around the said pump plunger.

I can also provide an air release valve 56 for the oil reservoir, if preferred.

A suitable support 60 is formed for the rear end of the base plate 10 and may consist of a piece of pipe bent into substantially U-shaped form with the terminals thereof inserted in sockets 61 carried by the upper face of the base plate 10. This port 60 is curved downwardly as at 62 for engaging the ground. In operation of the improved device, the cylinder 13 is filled with the lubricant and the valve 34 is closed tocut ofl' communication between the reservoir 33 and the cylinder 13, and the pump plunger 43 is now manipulated by the lever 44 On the up stroke ofthe pump plunger 43, oil will be sucked into the pump cylinder and lift the valve 52 ofi of its seat. Upon downward movement of the pump plunger, the oil will be trapped between the plunger and-the valve 52 and consequently will force the valve 53 from its seat and the oil will be forced into the cylinder below the piston. Upon continued movement of the pump plunger, the oil will be forced into the cylinder below the piston under pressure gradually forcing the piston upwardly and the lubricant out of the nozzle of the desired bearing.

After all of the lubricant has been dispensed, the valve 34 can be opened and the cylinder head 17 removed as heretobefore described and the piston 18 is forced down in any desired way and the oil belowthe piston will be forced through the passageway 32 into the reservoir 33. The lubricant can now be placed in the cylinder and the device again operated as heretofore described.

If desired, a drain plug 65 can be provided for the reservoir 33 to permit the draining thereof when preferred.

From the above description, it can be seen that I have provided an exceptionally simple hydraulic grease gun which will permit the effective use of heavy lubricants therewith.

Changes in details may be made without departing from the spirit or the scope of this invention, but:

What I claim as new is:

1. A lubricating device comprising a base plate, ground wheels carried by the base plate, a reservoir tank secured to the lower face of the base plate, a cylinder head formed on the base plate, a cylinder for receiving a lubricant connected with the cylinder head, a removable head carried by the upper end of the cylinder having a lubricant outlet, a piston slidably mounted in the cylinder, and a pump carried by the base plate and communicating with the lower end of the cylinder below the piston and with the reservoir for forcing a liquid from .the reservoir into the cylinder.

2. A lubricating device comprising a base plate, ground wheels carried by the base plate, a reservoir tank secured to the lower face of the base plate, a cylinder head formed on the base plate, a cylinder for receiving a lubricant connected with the cylinder head, a removable head carried by the upper end of the cylinder having a lubricant outlet, a piston slidably mounted in the cylinder, a pump carried by the base plate and communicating with the lower end of the cylinder below the piston and with the reservoir for forcing a liquid from the reservoir into the cylinder, the cylinder head and base plate having a return passageway therein communicating respectively with the reservoir and the lower end of the cylinder, and a manually controlled valve for said passageway.

3. A lubricating device comprising a base plate, a wheel support for the base plate, a

cylinder head connected with the base plate, a cylinder connected to said head, a removable head for the upper end of the cylinder, a reservoir secured to the lower end of the base plate, a double ended piston slidably mounted in the cylinder, a pump cylinder carried by the base plate, the cylinder head and base plate having a passageway connecting the lower end of the first cylinder with the lower end of the pump cylinder, an inwardly opening outlet valve in said passageway at one side of the plunger, an inwardly opening inlet valve in said passageway below the plunger, and means for manually operating said plunger.

4. A lubricating device comprising a base plate, a Wheel support for the base plate, a cylinder head connected with the base plate, a cylinder connected to said head, a removable head for the upper end of the cylinder, a reservoir secured to the lower end of the base plate, a double ended piston slidably mounted in the cylinder, a pump cylinder carried by the base plate, the cylinder head and base plate having a passageway connecting the lower end of the first cylinder with the lower end of the pump cylinder an inwardly opening outlet valve in said passageway at one side of the plunger, an inwardly opening inlet valve in said passageway below the plunger,

and means for manually operating said plunger including a hand lever rockably mounted at its lower end on the base plate and extending alongside of the first cylinder, an arm extending beyond the pivot of the lever and formed thereon, and a link connecting the outer end of said arm to the pump plunger.

5. A lubricating device comprising a base plate, a wheel support for the base plate, a cylinder head connected with the base plate, a cylinder connected to said head, a removable head for the upper end of the cylinder, a reservoir secured to the lower end of the base plate, a double ended piston slidably mounted in the cylinder, a pump cylinder carried by the base plate, the cylinder head and base plate having a passageway connecting the lower end of the first cylinder with the lower end of the pump cylinder, an inwardly opening outlet valve in said passageway at one side of the plunger, an inwardly opening inlet valve in said passageway below the plunger, means for manually operating said plunger including a hand lever rockably mounted at its lower end on the base plate and extending alongside of the first cylinder, an arm extending beyond the pivot of the lever and formed thereon, a link connecting the outer end of said arm to the pump plunger, the cylinder head and base plate having a passageway formed therein diametrically opposite the first passageway and connecting the lower end of the first cylinder with the reservoir, and a manually controlled valve for controlling the flow of fluid through said last passageway.

6. A hydraulic lubricating device comprising a base plate, a wheeled support for the base plate, a liquid receiving reservoir bolted to the lower face of the base plate, a cylinder head formed on the upper face of the base plate, a cylinder secured to said head, a removable head for the upper end of the cylinder, a double ended piston slidably mounted in said cylinder, means for pumping the liquid from the reservoir into the cylinder below the piston, an outlet nipple formed on the upper cylinder head having a ground seat, an outlet head removably fitted on said seat, a clamp for detachably connecting the head on the nipple, an outlet pipe connected with the base plate, a hose and nozzle connected with the outlet pipe, and a supply pipe carried by the outlet head and rotatably associated with said outlet pipe.

In testimony whereof I aflix my signature.

KNIGHT N. WILLMORE. 

